Valve unit



FIG. 1 is a perspective view showing a “valve unit” incorporating the design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a valve unit, as shown and described. 